From 9ebe66b4a23733a468b4bbacb9ee1387201a8d75 Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Tue, 9 Nov 2010 11:00:50 -0500
Subject: [PATCH] slight refactor to old-IE detection.

---
 backbone.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/backbone.js b/backbone.js
index a16b6494..cf8239aa 100644
--- a/backbone.js
+++ b/backbone.js
@@ -664,11 +664,12 @@
     // Start the hash change handling, returning true if the current URL matches
     // an existing route, and false otherwise.
     start : function() {
-      if ($.browser.msie && $.browser.version < 8) {
+      var docMode = document.documentMode;
+      var oldIE = ($.browser.msie && docMode < 7);
+      if (oldIE) {
         this.iframe = $('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow;
       }
-      var docMode = document.documentMode;
-      if ('onhashchange' in window && (!docMode || docMode > 7)) {
+      if ('onhashchange' in window && !oldIE) {
         $(window).bind('hashchange', this.checkUrl);
       } else {
         setInterval(this.checkUrl, this.interval);